/ Dictionary / Index A air pump: Meaning and Definition of Find definitions for: air' pump" Pronunciation: [key] an apparatus for drawing in, compressing, or exhausting air. (caps.)the constellation Antlia. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. airproof air raid Related Content Daily Word Quiz: winsome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language